user
You need to complete the following task:

Add a transition statement at the beginning of the paragraph that links two ideas.

Air pollution has been linked to heart and lung disease, as well as cancer. It affects all age groups, from children to the elderly.

Answer:
assistant
By contaminating the air we breathe, air pollution can cause serious health effects. Air pollution has been linked to heart and lung disease, as well as cancer. It affects all age groups, from children to the elderly.